Our 4250 Series features 3M DST (Dispersive Signal Technology) touch. Providing a first-class solution for your interactive and touch-enhanced digital signage applications, the 4250-TU-PNE421-4D touch display from Display Werks features full 1080P high definition along with compatibility for use in both portrait and landscape modes. Fanless architecture helps ensure ultra-quiet reliable operation and the optional PN-ZB01 input/output expansion board provides maximum flexibility, including the ability to monitor display performance over a network.